Al·ien a.
1. Not belonging to the same country, land, or government, or to the citizens or subjects thereof; foreign; as, alien subjects, enemies, property, shores.
2. Wholly different in nature; foreign; adverse; inconsistent (with); incongruous; -- followed by from or sometimes by to; as, principles alien from our religion.
An alien sound of melancholy. --Wordsworth.
Alien enemy Law, one who owes allegiance to a government at war with ours. --Abbott.